Rivet tool



FIG. 1 is a front perspective side view of a rivet tool according to the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings illustrate portions of the rivet tool that forms no part of claimed design. 

CLAIM The ornamental design for a rivet tool, as shown and described. 